:root {
  color-scheme: light;
  --ink: #17211d;
  --muted: #5a6862;
  --line: #d9e1dc;
  --paper: #f8faf7;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-2: #c2410c;
  --accent-3: #2563eb;
  --dark: #14231f;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  text-decoration: none;
  font-weight: 800;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--dark);
  color: #fff;
  font-size: 0.82rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 650;
  font-size: 0.95rem;
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.7fr);
  gap: 32px;
  align-items: center;
  padding: 52px 0 64px;
}

.hero-copy h1,
.section-head h2,
.decision-layout h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.03;
}

.hero-copy h1 {
  max-width: 820px;
  font-size: clamp(3rem, 7vw, 6.4rem);
}

.hero-copy p:not(.eyebrow) {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1.7;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-panel {
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(145deg, rgba(15, 118, 110, 0.12), rgba(37, 99, 235, 0.08)),
    var(--panel);
  display: grid;
  align-content: center;
  gap: 12px;
  padding: 28px;
  box-shadow: 0 20px 60px rgba(23, 33, 29, 0.08);
}

.metric-label {
  color: var(--muted);
  font-weight: 750;
}

.hero-panel strong:first-of-type {
  font-size: 5rem;
  line-height: 0.9;
}

.hero-panel strong:last-of-type {
  color: var(--accent);
  font-size: 1.4rem;
}

.summary-band,
.decision-band {
  background: var(--dark);
  color: #fff;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
}

.summary-grid article {
  min-height: 140px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
}

.summary-grid span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.88rem;
  font-weight: 750;
}

.summary-grid strong {
  font-size: 1.32rem;
}

.section {
  padding: 80px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 24px;
}

.section-head h2,
.decision-layout h2 {
  font-size: clamp(2rem, 4vw, 3.7rem);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.filter {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  padding: 0 16px;
  cursor: pointer;
  font-weight: 750;
}

.filter.active {
  border-color: var(--dark);
  background: var(--dark);
  color: #fff;
}

.experiment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.experiment-card {
  min-height: 420px;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.experiment-card h3 {
  margin: 8px 0 0;
  font-size: 1.45rem;
  line-height: 1.16;
}

.status {
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--accent);
  padding: 4px 9px;
  font-size: 0.75rem;
  font-weight: 850;
  text-transform: uppercase;
}

.experiment-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.meta-list,
.score-list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.meta-row,
.score-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.meta-row dt,
.score-row dt {
  color: var(--muted);
  font-weight: 750;
}

.meta-row dd,
.score-row dd {
  margin: 0;
  text-align: right;
  font-weight: 800;
}

.site-link {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  text-decoration: none;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease;
}

.site-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.site-link span {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
  text-transform: uppercase;
}

.site-link strong {
  min-width: 0;
  overflow-wrap: anywhere;
  text-align: right;
  font-size: 0.95rem;
}

.next-actions {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
}

.decision-band {
  padding: 72px 0;
}

.decision-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 48px;
  align-items: start;
}

.decision-layout ul {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 20px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.6;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  min-height: 230px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px;
}

.timeline span {
  color: var(--accent-2);
  font-weight: 850;
}

.timeline strong {
  display: block;
  margin: 12px 0 8px;
  font-size: 1.15rem;
}

.timeline p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

@media (max-width: 900px) {
  .hero,
  .decision-layout {
    grid-template-columns: 1fr;
  }

  .experiment-grid,
  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .topbar,
  .nav-links {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    min-height: auto;
    padding-top: 36px;
  }

  .hero-copy h1 {
    font-size: clamp(2.5rem, 15vw, 4.2rem);
  }

  .summary-grid,
  .experiment-grid,
  .timeline {
    grid-template-columns: 1fr;
  }
}